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There has been a sudden increase in the rate of sea level rise

Fri, 08 May 2026 15:08:55 +0100

Satellite measurements show that in the early 2010s sea level rise suddenly accelerated to a rate of 4.1 millimetres per year, possibly in response to an increase in the rate of global warming


A vast dam across the Bering Strait could stop the AMOC collapsing

Sat, 09 May 2026 08:00:42 +0100

If a key ocean current collapses it could plunge northern Europe into a big freeze. Now researchers are weighing up a drastic intervention – building a 130-kilometre-wide dam between the US and Russia


A lost ancient script reveals how writing as we know it really began

Mon, 04 May 2026 17:00:56 +0100

A long-overlooked writing system from 5000 years ago is still largely undeciphered, but could mark the moment humans first represented their speech with written words


Neanderthal 'kneeprint' found next to mysterious stalagmite circle

Fri, 08 May 2026 11:11:57 +0100

An impression made in clay around 175,000 years ago could be a kneeprint left by one of the builders of a strange stalagmite circle found deep inside Bruniquel cave in south-west France


US government releases huge batch of UFO files

Fri, 08 May 2026 19:33:13 +0100

The US Department of Defense has released hundreds of documents and photographs related to UFOs, some of which have been declassified, in the first of many drops to come


Doubling their genomes may have helped plants survive mass extinctions

Fri, 08 May 2026 17:00:20 +0100

Many flowering plants have duplicated genomes, which could have helped them evolve to deal with extreme stress in times of environmental upheaval


Fire is spreading in the Chernobyl exclusion zone after drone crash

Fri, 08 May 2026 16:07:48 +0100

A drone has crashed in the Chernobyl exclusion zone, causing a fire that has spread to 12 square kilometres of land. Dry weather, strong winds and the presence of land mines are complicating efforts to bring the blaze under control


Slow breathing can calm the mind without any need for mindfulness

Fri, 08 May 2026 13:00:13 +0100

How important is thinking about your breath for calming yourself down? We now know that slow breathing is effective even without conscious involvement


PCOS postpones perimenopause and allows pregnancies at older ages

Thu, 07 May 2026 17:00:01 +0100

Only 3 per cent of those with polycystic ovary syndrome reach perimenopause by the age of 46, which may allow them to conceive when older


New Scientist recommends Attenborough documentary Making Life on Earth

Wed, 06 May 2026 19:00:38 +0100

The books, TV, games and more that New Scientist staff have enjoyed this week


The mathematician who doesn’t exist

Fri, 08 May 2026 10:00:34 +0100

A secret society of French mathematicians has been revolutionising the field of mathematics under a pseudonym for nearly a century. Columnist Jacob Aron finds that this mythic collective provided maths a rigorous and useful foundation, and did some real harm along the way


Former Soviet scientific megastructures captured in striking photos

Wed, 06 May 2026 19:00:28 +0100

Eric Lusito crossed the former Soviet Union to explore vast scientific sites, some of which have been deserted for years, for his new book


Hantavirus outbreak will not cause a covid-style pandemic, says WHO

Thu, 07 May 2026 17:40:22 +0100

The World Health Organization sought to quell worldwide fears over the hantavirus outbreak on the cruise ship MV Hondius and reassure the public that the risk of widespread transmission is low


Coffee's mood-boosting effects aren't just down to caffeine

Thu, 07 May 2026 16:00:49 +0100

A comprehensive study exploring coffee’s physiological effects finds that some of its benefits are down to polyphenols and their influence on gut bacteria


What to read this week: the excellent Beyond Belief by Helen Pearson

Wed, 06 May 2026 19:00:00 +0100

Solving society's problems with evidence is a work in progress, argues a must-read new book. The process is surprisingly new – and riddled with complexities, finds Michael Marshall


Where has the deadly hantavirus come from and how does it spread?

Tue, 05 May 2026 14:20:10 +0100

Three passengers on the cruise ship MV Hondius have died due to an outbreak of hantavirus, a rare illness transmitted by rodents


The best new popular science books of May 2026

Thu, 07 May 2026 12:00:47 +0100

A guide to walking, a look at the world’s Google searches and a deep dive into the secrets of our DNA are some of the topics tackled by the popular science books out this month


Less nostalgia, more pain: scientists study 1763 Eurovision songs

Wed, 06 May 2026 19:00:00 +0100

Feedback discovers that the prevailing themes of Eurovision songs may come and go, but the urge to win stays the same.


What to read this week: The 21st Century Brain by Hannah Critchlow

Wed, 29 Apr 2026 19:00:00 +0100

Our brains need to adapt quickly to meet the challenges of our digital world, but a rigorous new book by a neuroscientist brings hope that we can do it, says Graham Lawton


Pressure from individual particles measured for the first time

Thu, 07 May 2026 07:00:42 +0100

A device made using a tiny bead floating in a beam of light can measure extremely small pressures and could help find a mysterious kind of neutrino


Dating over 50 is probably on the rise – but we know little about it

Wed, 06 May 2026 21:00:36 +0100

Research into dating has until now almost exclusively focused on younger people, but we’re finally beginning to investigate how romance changes in later life


Bronze Age Britons fashioned copper-mining tools out of old bones

Wed, 06 May 2026 19:00:21 +0100

An analysis of 150 artefacts from a site in Wales shows that the ancient practice of making tools out of bone persisted even after the advent of metal-working


Deforestation could trigger Amazon tipping point in the 2030s

Wed, 06 May 2026 17:00:19 +0100

At least 15 per cent of the Amazon has already been lost, and further destruction could unleash widespread rainforest dieback with as little as 1.5°C of global warming


Huge landslide in Alaska caused 481m-high tsunami

Wed, 06 May 2026 14:00:01 +0100

When the slope of a mountain above Tracy Arm fjord, in Alaska, gave way on 10 August 2025, 64 million cubic metres of rock fell into the fjord, causing a 5.4 magnitude seismic event  


Robin Wall Kimmerer's Braiding Sweetgrass is still an essential read

Wed, 06 May 2026 13:00:37 +0100

This 2013 book by an Indigenous botanist is a quietly urgent act of healing that forces Western science to look at the world in a different way


Read the winner of this year’s Young Science Writer Award

Wed, 06 May 2026 11:00:12 +0100

Prize-winning young writer Hasset Kifle, 17, explores how the world of super-competitive running is being transformed by so-called “super shoes” – and what cost this will have on the sport


Extinct relative of koalas discovered in Western Australia

Wed, 06 May 2026 01:01:10 +0100

Fossils reveal that there were at least two kinds of koala when humans first arrived in Australia, but one died out about 30,000 years ago when the west of the continent dried out


Backlash builds over NHS plan to hide source code from AI hacking risk

Tue, 05 May 2026 17:00:06 +0100

NHS England is pulling its open-source software from the internet because of fears around computer-hacking AI models like Mythos. Opposition is growing among those who say the move is bad for transparency and efficiency, and will also do nothing to improve security


Woman in cancer remission without treatment in highly unusual case

Tue, 05 May 2026 11:00:47 +0100

A biopsy of a woman's cancer seems to have triggered an immune response against the tumour, putting her into remission


The problem of cosmic inflation and how to solve it

Tue, 05 May 2026 10:00:50 +0100

One of the best-performing models in cosmology is also one with the least physical rationale behind it. Columnist Leah Crane says this leaves us with a puzzle that could make or break physics as we know it


Man destined for Alzheimer's may have been saved by accidental therapy

Tue, 05 May 2026 08:00:29 +0100

Doug Whitney has a genetic mutation that means he should have developed Alzheimer’s disease decades ago, but his long-term work in hot engine rooms may have protected him in a similar way to sauna therapy


Quantum computers simulated their biggest molecule yet – with help

Tue, 05 May 2026 06:01:57 +0100

Two quantum computers and two supercomputers teamed up to break the record for the biggest molecule yet to be simulated using quantum hardware


Honey has been used as medicine for centuries – does it really work?

Mon, 04 May 2026 17:08:16 +0100

It is appealing to think something as simple as honey could cure a cold or prevent hay fever, but is there evidence to back up honey’s health benefits? Columnist Alice Klein finds that it has legitimate medicinal uses, depending on the type of honey you’ve got


Tiny frozen world unexpectedly appears to have an atmosphere

Mon, 04 May 2026 17:00:46 +0100

A 500-kilometre-wide object in a similar orbit to Pluto challenges our assumptions about small bodies in the outer solar system


300-year-old experiment could become world's best dark matter detector

Mon, 04 May 2026 14:00:54 +0100

An update to an experiment run by Henry Cavendish in 1773 could be a cheaper and faster way to spot a potential dark matter particle – and may be 10,000 times more sensitive


An unorthodox version of quantum theory could reveal what reality is

Fri, 01 May 2026 07:00:38 +0100

The implications of quantum mechanics suggest reality isn't as solid as we think it is, but physicist David Bohm had a spin on the theory that restores reality. Columnist Karmela Padavic-Callaghan explores how we could test Bohmian mechanics – and if it will ever become more widely accepted


The greatest David Attenborough documentaries you really need to watch

Mon, 04 May 2026 11:00:49 +0100

To mark David Attenborough turning 100, New Scientist staff have been set a tricky task: pick your favourite of his many amazing documentaries...


Prebiotic chewing gum could be helpful for gum disease

Mon, 04 May 2026 11:00:45 +0100

A small trial found that chewing gum containing nitrate can ease the symptoms of gum disease by favouring the growth of beneficial mouth bacteria


Smart underwear detects lactose intolerance by tracking your farts

Mon, 04 May 2026 07:00:07 +0100

A device you attach to your underwear reveals how often you really break wind – and it’s probably more frequently than you think


Why dinosaurs lived much more complex lives than we thought

Wed, 29 Apr 2026 17:00:22 +0100

A wave of dinosaur discoveries over the past decade has completely reshaped our understanding of these long-extinct animals. Palaeontologist Dave Hone spills the secrets of how dinosaurs lived, from how social they were to how much they really fought 


Is consciousness more fundamental to reality than quantum physics?

Tue, 28 Apr 2026 17:00:05 +0100

The idea that everything that exists can be built from the bottom up has long held sway among physicists. Now, a new kind of science is under construction that centres conscious experience – and might unravel the universe’s biggest mysteries


Our verdict on Red Mars: Mostly great, with a few quibbles

Wed, 29 Apr 2026 19:00:46 +0100

The New Scientist Book Club read Kim Stanley Robinson's acclaimed science fiction story about the first settlers on Mars in April – and had a lot to say about it


Ann Leckie continues to shine with new sci-fi novel Radiant Star

Wed, 29 Apr 2026 19:00:00 +0100

Set on a planet whose population lives underground, Radiant Star is Ann Leckie's latest Radch-universe novel. Its rich characterisation and meticulous world-building shine through, says our science-fiction columnist Emily H. Wilson


2026 will be the hottest year on record, leading scientist predicts

Fri, 01 May 2026 18:24:54 +0100

The second half of this year will almost certainly see the start of an El Niño phase that could lead to extreme heat across much of the globe, and James Hansen expects that to make this year surpass 2024 as the hottest on record


Why the keto diet could be a revolutionary way to treat mental illness

Mon, 27 Apr 2026 17:00:03 +0100

You may think of the high-fat, low-carb eating plan as a faddish way to lose weight. But the keto diet is now being used to tackle conditions from severe depression to bipolar disorder and anorexia, with transformative results


NHS England rushes to hide software over AI hacking fears

Fri, 01 May 2026 13:32:04 +0100

National Health Service rules state that all software created with public money should be publicly available, but fears of computer-hacking AI models like Mythos have prompted a change in policy


The 4 biggest myths about hydration, according to an expert

Fri, 01 May 2026 13:00:28 +0100

Should you really be drinking eight glasses of water a day? What about reaching for a sports drink after exercise? Physiologist Tamara Hew-Butler is here to bust these hydration myths and more.


Oak trees use delaying tactics to thwart hungry caterpillars

Fri, 01 May 2026 11:00:50 +0100

An infestation of caterpillars can make an oak tree postpone when it opens its leaves next year by three days, wrong-footing the insects when they attack again


Why I explore our inevitable love for robots in my novel Luminous

Fri, 01 May 2026 10:35:41 +0100

Silvia Park, author of the May read for the New Scientist Book Club, reveals how a book that was originally intended to be for children took a darker route following a death in the family


Read an extract from Luminous by Silvia Park

Fri, 01 May 2026 10:35:05 +0100

In this extract from Luminous, the May read for the New Scientist Book Club, we meet a mysterious robot discovered in a salvage yard in Seoul, in a future reunified Korea


Will Colombia summit kick-start the end of the fossil fuel era?

Fri, 01 May 2026 10:58:36 +0100

With progress at COP climate meetings stalling, 57 countries took part in the first of a new series of conferences aiming to develop road maps away from fossil fuels, but big emitters like China and the US were absent


The rings of Uranus are even stranger than we thought

Fri, 01 May 2026 09:00:01 +0100

Uranus’s outermost two rings are surprisingly dissimilar, which opens up a mystery about the tiny moons and moonlets that form them


'Green' cryptocurrency uses 18 times more energy than makers claim

Thu, 30 Apr 2026 19:00:45 +0100

A cryptocurrency that aims to avoid the disastrous energy consumption of bitcoin is actually using 18 times more energy than its makers claim – but it promises improvements are on the way


Your oral microbiome could affect your weight, liver and diabetes risk

Thu, 30 Apr 2026 18:00:53 +0100

An ambitious study has explored how the oral microbiome may affect our metabolic health, raising hopes that conditions like pre-diabetes could one day be screened for via a simple mouth swab


We have figured out a new way to send messages into the past

Thu, 30 Apr 2026 11:00:05 +0100

A technique inspired by the film Interstellar suggests a new way of communicating backwards in time, but it could help improve conventional communication systems as well


Human heads have changed shape a lot in the past 100 years

Thu, 30 Apr 2026 16:00:54 +0100

Since the early 20th century, people’s skulls have got rounder and their jaws have got wider, probably because of changes in health, diet and environment


Doubts cast over 'wild' claim that magnetic control can turn on genes

Thu, 30 Apr 2026 13:00:48 +0100

Researchers in South Korea say they have made a major advance by turning on genes with an electromagnetic signal, but critics say the claims are implausible and the paper is flawed


The best new science fiction books of May 2026

Thu, 30 Apr 2026 13:00:43 +0100

New science fiction from big names including Ann Leckie, Alan Moore and Martha Wells are just some of the exciting crop of titles out this month


The rich but complicated legacy of genome pioneer Craig Venter

Thu, 30 Apr 2026 12:54:04 +0100

Craig Venter has died aged 79. He was at the forefront of sequencing the human genome and of synthetic biology, but divided opinion in how he went about it


Thought-provoking photographs capture what it feels like to have ADHD

Wed, 29 Apr 2026 19:00:07 +0100

These unusual images were created by visual artist Daniel Regan by submerging Polaroid photographs in his ADHD medication, to represent his experiences with the condition through art


Is an AI version of Mark Zuckerberg – or any boss – a good plan?

Wed, 29 Apr 2026 19:00:00 +0100

Feedback has learned that, according to reports, Meta is building an AI version of Mark Zuckerberg to interact with staff. Feedback hopes this doesn't become a trend


Simple treatment tweak drastically reduces blood loss from severe cuts

Wed, 29 Apr 2026 17:25:02 +0100

A procedure that could be done in half an hour, and prepared ahead of time, could seriously reduce blood loss from severe wounds, such as during surgery


Weird 'transdimensional' state of matter is neither 2D nor 3D

Wed, 29 Apr 2026 17:00:37 +0100

An experiment with a carbon material in a magnetic field has revealed a novel way for electrons to move, which doesn't fully belong in two or three spatial dimensions


The chips in your phone are probably broken – and that's a good thing

Wed, 29 Apr 2026 15:00:50 +0100

Reports suggest that Apple is using defective chips originally destined for high-end devices to create its latest affordable laptop. Reusing partially broken chips is common practice for all device makers and produces less waste


Scorpions reinforce their claws and stingers with metals

Wed, 29 Apr 2026 13:18:32 +0100

Many scorpion species use blends of iron, zinc and manganese to enhance the toughness of their deadly weaponry


Extreme weather in 2025 drove record wildfire emissions in Europe

Wed, 29 Apr 2026 11:53:56 +0100

Europe, the fastest-warming continent, saw unprecedented wildfires and heatwaves in 2025, including a three-week hot spell that hit 30°C inside the Arctic circle


Cancer is increasing in young people and we still don't know why

Wed, 29 Apr 2026 00:30:36 +0100

Obesity might be to blame for part of the increase in cancer among young people, a study in the UK has found, but the causes largely remain a mystery


Gamblers are betting millions of dollars on measles outbreaks

Tue, 28 Apr 2026 17:00:56 +0100

People are increasingly placing bets that predict measles outbreaks in the US, which could help researchers modelling the spread of the disease


Humanoid robots may be about to break the 100-metre sprint record

Tue, 28 Apr 2026 15:00:26 +0100

Robots can now run a half-marathon faster than humans and are rapidly homing in on the men's 100-metre sprint record. But why are companies so keen to create speedy robots that have no obvious application in homes or factories?


How I pay almost nothing to power my house and electric car

Tue, 28 Apr 2026 11:00:25 +0100

The ongoing closure of the Strait of Hormuz has seen energy prices soar, but Alice Klein pays just A$25 (£13) a month for her electricity, even when charging an electric car or running an air conditioner.


Coral reefs on a remote archipelago shrugged off a massive heatwave

Mon, 27 Apr 2026 17:00:58 +0100

Scientists were shocked to find that the Houtman Abrolhos Islands’ coral reefs survived a prolonged extreme heatwave in 2025 virtually unharmed, which may reveal how to protect corals elsewhere


We may finally have a cure for many different autoimmune conditions

Tue, 28 Apr 2026 10:00:02 +0100

A revolutionary cancer treatment is now being applied to a wide range of autoimmune disorders. Columnist Michael Le Page finds it is proving to be even more effective than expected


Giant Arctic continent launched dinosaurs to world domination

Mon, 27 Apr 2026 13:00:57 +0100

Coincident with the rise of the dinosaurs, a large landmass filled most of the Arctic circle, potentially contributing to global cooling that advantaged the famous reptiles


10,000 new planets found hidden in NASA telescope data

Mon, 27 Apr 2026 11:00:48 +0100

NASA's Transiting Exoplanet Survey Satellite has been searching for exoplanets since its launch in 2018, and it turns out it may have found plenty more of them than we had thought


Why your opinion of used electric vehicles is probably wrong

Wed, 22 Apr 2026 19:00:00 +0100

The idea that EV batteries age poorly is a misconception – and a new report has found they often outlive the cars themselves


How your heart rate variability can offer an insight into your mind

Mon, 27 Apr 2026 10:00:42 +0100

Smartwatches commonly use heart rate variability to monitor stress. Columnist Helen Thomson explores what this metric actually tells us, and whether it could also predict and diagnose depression – and help improve your mental health more generally


100-year-old assumption about the universe may soon be overturned

Mon, 27 Apr 2026 08:00:31 +0100

Physicists have long assumed that the universe is uniform at very large scales, but evidence is emerging this is wrong and suggests a way to resolve some of the biggest cosmological mysteries


We need more radioactive drugs. Can we make them from nuclear waste?

Wed, 22 Apr 2026 17:00:58 +0100

The rise of a new generation of radiotherapies means we will soon need much greater quantities of radioactive atoms. That's why companies are scrambling to refine them from all manner of radioactive waste


Why the right kind of stress is crucial for your health and happiness

Mon, 20 Apr 2026 15:00:47 +0100

Stress is linked to many of our biggest killers, but a growing body of research suggests that certain types can sharpen the mind and strengthen the body. Here’s how to find your perfect dose


This mesmerising Cornish time-travel film is not to be missed

Wed, 22 Apr 2026 19:00:00 +0100

A seaside town is devastated when a small fishing boat, the Rose of Nevada, disappears at sea. Thirty years later, the boat reappears in the harbour and sets off a moving story, says Bethan Ackerley


Gravity's strength measured more reliably than ever before

Fri, 24 Apr 2026 19:00:34 +0100

Measuring the strength of gravity is extraordinarily difficult, and different experiments have always disagreed – but a new test is paving the way to finally understanding nature’s most enigmatic force


Symptoms of early dementia reversed by bespoke treatment plans

Fri, 24 Apr 2026 13:33:58 +0100

People with cognitive decline or early-stage dementia saw their symptoms improve when given bespoke treatment plans that targeted their personal nutritional deficiencies, ongoing infections and environmental exposures


QBox theory may offer glimpse of reality deeper than quantum realm

Fri, 24 Apr 2026 11:00:12 +0100

Physicists have long suspected that there is a layer of physical reality beneath quantum theory and a new mathematical model unveils just how strange it might be


New Scientist recommends Jeff Beal’s New York Études, Vol. II

Wed, 22 Apr 2026 19:00:29 +0100

The books, TV, games and more that New Scientist staff have enjoyed this week


Largest-ever octopus was great white shark of invertebrate predators

Thu, 23 Apr 2026 20:00:12 +0100

During the Cretaceous, 19-metre-long predatory octopuses swam the seas, and evidence from their fossilised remains suggest they may have been highly intelligent hunters


Is stem cell therapy about to transform medicine and reverse ageing?

Fri, 24 Apr 2026 10:00:12 +0100

A clinical trial to reverse age-related vision conditions using stem cell treatment could finally deliver on the promise of a major discovery in ageing and regeneration made 20 years ago, says columnist Graham Lawton


Striking photo essay examines deadly spread of dengue fever in Nepal

Wed, 22 Apr 2026 19:00:48 +0100

Photographer Yuri Segalerba explores how dengue has spread to Nepal's Himalayan districts, and how locals are fighting back


Do you need to worry about Mythos, Anthropic's computer-hacking AI?

Thu, 23 Apr 2026 19:00:34 +0100

A powerful AI kept from public access because of its ability to hack computers with impunity is making headlines around the world. But what is Mythos, does it really represent a risk and might it even be used to improve cybersecurity?


Exercise advice for long covid may be doing more harm than good

Wed, 22 Apr 2026 15:23:29 +0100

Exercise has been touted as a tool for managing and treating long covid, but much of the evidence has neglected one of its most debilitating symptoms: post-exertional malaise


Catching a cold can delay cancer from spreading to the lungs

Thu, 23 Apr 2026 18:00:20 +0100

Infecting mice with RSV, a common virus that causes cold-like symptoms, prevented breast cancer cells from reaching their lungs. This was due to the release of proteins that stop viruses from replicating in the lungs also making it harder for cancer cells to seed new tumours


Huge study reveals how Epstein-Barr virus may cause multiple sclerosis

Thu, 23 Apr 2026 17:00:39 +0100

The Epstein-Barr virus seems to affect gene expression and cell signalling in a way that causes the autoimmune condition multiple sclerosis


How many dachshunds would it take to get to the moon?

Wed, 22 Apr 2026 19:00:00 +0100

Feedback, always on the hunt for absurd units of measurement, is delighted by recent attempts to convey the 406,771 kilometres that the Artemis II crew travelled from Earth


Can you slow ageing with your diet? A new book gives it a go

Wed, 22 Apr 2026 19:00:00 +0100

Discovering he is getting old before his time, David Cox tries to lower his biological age by changing his diet in a helpful new book, The Age Code, says Graham Lawton


98 per cent of meat and dairy sustainability pledges are greenwashing

Wed, 22 Apr 2026 19:00:42 +0100

The food industry has made big promises to reduce emissions and become more sustainable, but a review concludes that many of the pledges are not backed up by evidence


Table tennis-playing robot on track to becoming world champion

Wed, 22 Apr 2026 17:00:19 +0100

A robot built by Sony AI is rapidly learning how to beat the world's very best table tennis players


Fermat's Last Theorem: still a must-read about a 350-year maths secret

Wed, 22 Apr 2026 13:00:36 +0100

Simon Singh's exploration of mathematical proof – in particular Pierre de Fermat's last theorem – remains an absolute treasure, almost three decades after it was first published


If a bird flu pandemic starts, we may have an mRNA vaccine ready

Wed, 22 Apr 2026 01:01:21 +0100

A final-stage trial has started of an mRNA vaccine against the bird flu strain infecting many animals – and occasionally people – worldwide


Titan’s strange plains may be explained by unusual weather

Tue, 21 Apr 2026 18:00:44 +0100

Most of Titan’s surface is oddly flat and smooth, and it may be because it is coated by as much as a metre of fluffy organic material that snowed down from the icy moon’s thick atmosphere


The monstrous number sequences that break the rules of mathematics

Tue, 21 Apr 2026 17:00:07 +0100

Some seemingly simple sequences of multiplication and addition grow so quickly that they question the very foundations of mathematics. In doing so, they demand a whole new level of logic


Game theory explains why the US's goals in Iran keep changing

Tue, 21 Apr 2026 15:57:39 +0100

The ongoing conflict around the Strait of Hormuz has become a situation in game theory known as a war of attrition. The maths behind it can help explain what's going on, says Petros Sekeris